well I m having this issue, high ping here but not in iw4m with same host servers, what is this for?

NRNS for example and Grosskofp usually I have around 120 ping playing mw2 but in mw3 is above 200

this is kinda true, but i can't say i got the same issue. i mean since i put up optic fiber connection, it's been amazing. but it's a bit true, cause while in MW2 i got like 70ms, in MW3 i got like 120... sometimes it kicks down to 80 / 70.. honestly i dunno, maybe it's the servers, maybe its the games core that is made to work like this.

It's not your connection thats having issues, its the servers to be honest.. the game has been out since yesterday, give it time to the servers to get back to normal